diff options
| -rw-r--r-- | drivers/spi/spi-tegra210-quad.c | 19 |
1 files changed, 17 insertions, 2 deletions
diff --git a/drivers/spi/spi-tegra210-quad.c b/drivers/spi/spi-tegra210-quad.c index cdc3cb7c01f9..f0408c0b4b98 100644 --- a/drivers/spi/spi-tegra210-quad.c +++ b/drivers/spi/spi-tegra210-quad.c @@ -1552,15 +1552,30 @@ exit: static irqreturn_t tegra_qspi_isr_thread(int irq, void *context_data) { struct tegra_qspi *tqspi = context_data; + u32 status; + + /* + * Read transfer status to check if interrupt was triggered by transfer + * completion + */ + status = tegra_qspi_readl(tqspi, QSPI_TRANS_STATUS); /* * Occasionally the IRQ thread takes a long time to wake up (usually * when the CPU that it's running on is excessively busy) and we have * already reached the timeout before and cleaned up the timed out * transfer. Avoid any processing in that case and bail out early. + * + * If no transfer is in progress, check if this was a real interrupt + * that the timeout handler already processed, or a spurious one. */ - if (!tqspi->curr_xfer) - return IRQ_NONE; + if (!tqspi->curr_xfer) { + /* Spurious interrupt - transfer not ready */ + if (!(status & QSPI_RDY)) + return IRQ_NONE; + /* Real interrupt, already handled by timeout path */ + return IRQ_HANDLED; + } tqspi->status_reg = tegra_qspi_readl(tqspi, QSPI_FIFO_STATUS); |